Investments in Marketable Securities - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023
Marketable Securities [Abstract]
Fair value option elected	$ 761,000,000		$ 770,000,000
Available-for-sale debt securities unrealized loss	$ 69,000,000		$ 57,000,000
Private placement share redemption percentage	1.00%
Private placement share redemption amount	$ 250,000
Share redemption period	90 days
Non-cash investing activities related to in-kind transactions	$ 0	$ 0